Synergistic mixture

Abstract

A synergistic mixture comprising from 1 to 99.9% by weight of compounds having structural elements (I) in which the free valencies on the oxygen atom and on the nitrogen atom may be combined to form a five-, six- or seven-membered ring and the benzene ring may also bear substituents at one or more of the free positions, and from 0.1 to 99% by weight of sulfur-containing organic compounds with antioxidant action. This synergistic mixture is suitable as a stabilizer for stabilizing inanimate organic material, especially mineral oil products and fuels, against the action of light, oxygen and heat.

The invention claimed is: 
     
       1. A turbine or jet fuel selected from the group consisting of Jet Fuel A, Jet Fuel A-1, Jet Fuel B, Jet Fuel JP-4, JP-5, JP-7, JP-8 and JP-8+100, Jet A and Jet A-1, comprising 12 to 480 mg/L relative to a total weight of the fuel of a mixture of components (A) and (B) comprising
 (A) from 65 to 90% by weight of the mixture of (A) and (B) of at least one compound having at least one polycyclic phenolic compound of the following formula 
 
       
         
           
           
               
               
           
         
         (B) from 10 to 35% by weight of the mixture of (A) and (B) of at least one of a hydroxyl-containing diaryl sulfide, a reaction product of polyisobutene with thiophenol, and a reaction product of polyisobutenes with elemental sulfur, 
         where the sum of the two components (A) and (B) adds up to 100% by weight. 
       
     
     
       2. A method of improving thermal stability of a turbine or jet fuel selected from the group consisting of Jet Fuel A, Jet Fuel A-1, Jet Fuel B, Jet Fuel JP-4, JP-5, JP-7, JP-8 and JP-8+100, Jet A and Jet A-1, the method comprising combining the fuel with a stabilizer comprising 12 to 480 mg/L of a mixture of components (A) and (B) comprising
 (A) from 65 to 90% by weight of the mixture of (A) and (B) of at least one compound having at least one polycyclic phenolic compound of the following formula 
 
       
         
           
           
               
               
           
         
         (B) from 10 to 35% by weight of the mixture of (A) and (B) of at least one of a hydroxyl-containing diaryl sulfide, a reaction product of polyisobutene with thiophenol, and a reaction product of polyisobutenes with elemental sulfur, 
         where the sum of the two components (A) and (B) adds up to 100% by weight. 
       
     
     
       3. A method of reducing deposits in a fuel system or combustion system of a turbine, the method combusting a turbine or jet fuel selected from the group consisting of Jet Fuel A, Jet Fuel A-1, Jet Fuel B, Jet Fuel JP-4, JP-5, JP-7, JP-8 and JP-8+100, Jet A and Jet A-1, the method comprising 12 to 480 mg/L of a mixture of components (A) and (B) comprising
 (A) from 65 to 90% by weight of the mixture of (A) and (B) of at least one compound having at least one polycyclic phenolic compound of the following formula 
 
       
         
           
           
               
               
           
         
         (B) from 10 to 35% by weight of the mixture of (A) and (B) of at least one of a hydroxyl-containing diaryl sulfide, a reaction product of polyisobutene with thiophenol, and a reaction product of polyisobutenes with elemental sulfur, 
         where the sum of the two components (A) and (B) adds up to 100% by weight. 
       
     
     
       4. The fuel of  claim 1 , wherein (A) is (XXXa) R 19 =methyl, R 20 =R 22 =H, R 27 =PIB. 
     
     
       5. The fuel of  claim 1 , wherein (A) is (XXXb) R 19 =methyl, R 20 =R 22 =tert-butyl, R 27 =PIB. 
     
     
       6. The fuel of  claim 1 , wherein (A) is (XXXc) R 19 =methyl, R 20 =tert-butyl, R 22 =methyl, R 27 =PIB. 
     
     
       7. The fuel of  claim 1 , wherein (A) is (XXXd) R 19 =R 20 =methyl, R 22 =tert-butyl, R 27 =PIB. 
     
     
       8. The fuel of  claim 1 , wherein (A) is (XXXe) R 19 =3-(dimethylamino)propyl, R 20 =R 22 =tert-butyl, R 27 =PIB. 
     
     
       9. The fuel of  claim 1 , wherein (A) is (XXXf) R 19 =PIB, R 20 =R 22 =R 27 =H. 
     
     
       10. The fuel of  claim 1 , wherein (A) is (XXXg) R 19 =PIB, R 20 =R 22 =H, R 27 =tert-butyl. 
     
     
       11. The fuel of  claim 1 , wherein (A) is (XXXh) R 19 =PIB, R 20 =R 22 =tert-butyl, R 27 =H. 
     
     
       12. The fuel of  claim 1 , wherein (A) is (XXXi) R 19 =PIB, R 20 =H, R 22 =R 27 =tert-butyl. 
     
     
       13. The fuel of  claim 1 , wherein (A) is (XXXj) R 19 =PIB, R 20 =R 22 =R 27 =tert-butyl. 
     
     
       14. The fuel of  claim 1 , wherein (A) is (XXXk) R 19 =PIB, R 20 =R 22 =H, R 27 =PIB. 
     
     
       15. The fuel of  claim 1 , wherein (B) is a hydroxyl-containing diaryl sulfide. 
     
     
       16. The fuel of  claim 1 , wherein (B) is a reaction product of polyisobutene with thiophenol. 
     
     
       17. The fuel of  claim 1 , wherein (B) is a reaction product of polyisobutenes with elemental sulfur.